Position an offcut of PVC pipe or a long cardboard tube in the centre of the strawberry pot. Hold the pipe steady on the base of the pot, then fill around it with potting mix as far as the first planting holes.

Add trailing varieties to the side holes of the pot, pushing the herbs through from the inside and firming the potting mix around them. Work your way up, adding plants and potting mix until you reach the top.

Fill the pipe with gravel to the level of the potting mix, then ease out the pipe, leaving the core of gravel behind. Make planting holes to add herbs to the top of the pot, watering in well with seaweed solution.